CONFERENCE IN HONOR OF ALLAN PETERSON Monastery of Novacella, 28th July 2007 - 2nd Aug 2007 Tuesday 31st July ***************** AUGUSTINI HALL 09:30 Martin Bohner (CHAIRMAN OF THE MORNING SESSION): "Laudatio of the Day for Allan Peterson" 09:45 Istvan Gyori: "Hybrid systems: discrete and continuous dynamics" 10:45 Break 11:00 Ondrej Dosly: "Oscillation Theory of Symplectic Difference Systems" 11:45 End of Morning Session SOCIAL ROOM 11:45 Lunch Coffee Break HARTMANN HALL Ondrej Dosly CHAIRMAN OF AFTERNOON SESSION 15:00 Thomas Ernst: "q-complex numbers, a natural consequence of umbral calculus" 15:45 Break 16:00 Youssef Raffoul: "Periodicity in Nonlinear Systems With Infinite Delay" RESTAURANT OF THE MONASTERY 18:30 Dinner